Demountable rim.



A. DENIS.

DEMOUNTABLE RIM. APPLICATION FILED 0GT.7,1911.

1,056,156, Patented Mar.18,1913.

WYTNESSES: LVVENTOR,

fiZZerZ fiezzzls',

Z I BY :ALBERT DENIS, 0F SPRINGFIELD, MASSACHUSETTS.

DEMOUNTABLE RIM.

Specification of Letters Patent. Patented Elgar, 18',--- 1-913 Application filed October 7, 1911. Serial No. 653,318.

To all ic/tom 1t I'll((McullCC/OL.

Be it known that l, ;\LBEIKT Dams, a Brit isa subject. and: resident of Springfield. in thecouuty of Hampden and State of Massachusetts, have invented certain new and useful Improvements in Demountable Rims, of which the following is a full. clear, and exact description.

The objectof this invention is to scrollstruct. and combine the main rim of an automobile and a demountable tire carrying rim and to provide means for securing the demouutable rim on the telly. that the application and confinement of the demount able rim may be most quickly. conveniently and securely elfected as well as its removal for replacement by another similar rim, as occasion may require. And in the carrying out of the invent-ion an aim' is to provide in the engaging and confining devices means of such character that when the demountable rim is in place there can be no possiiiity of its creeping circumferentially on the telly or becoming in any degree transversely displaced. r

Theinvention is described in theaccompanyiug drawings and is set forth in the claim. v

In the drawings:Jigure- 1 is aside elevation of an automobile telly and its demountable rim with parts shown in vertical section for clearer illustration. Fig. "2 is a partial sectional'view as taken n line 2-2, Fig. 1. Figs. 3 and 4E are cross sections on lines and l. Fig. 1. and Fig. is a perspective view of the disassembled telly, rim and key blocks.

Similar characters of reference indicate corresponding parts in all of the views.

in the drawings. A represents the permanent. main rim of a wheel constructed with a plurality of depressionsor recesses a within its peripher at regularly spaced dis tances apart. In practice threeot the recesses a are shown at thirds. the same opening to lllOODPQE-lt edges of the rim and having each a convergent. or V-shaped recess extension at one end while the other end boundary ot' each recess a is formed by an obt-usely angular shoulder b.

T he demountable rim B.which may be of any desired type. as.- for instance, a clencher riin.has a plurality of integral or permanently allixed lugs or tongues (Z (Z on its inner surface, which are of V-shape, corresponding to the convergence of the reoess extension a the lengths of which are,

rim is brought to engagement with the telly by relative transverse movements Ofthese parts when the tongues (l have matching relation with the recesses a, and when the rim acquires its encircling engagement about the telly the.rim is rotatively moved so that the V-shaped tongues are moved into the convergent recess extensions a with their butt ends 11 projecting slightly into the recesses (1. And for the retention of the rim on the telly. pairs ofrkey blocks D D are inserted in the recesses (1 of the telly at opposite edges of the latter. The opposite end edges of these key blocks are obtusely angular to each other. as shown. and have engagements both with the shoulders 7) formed on the telly and the obtusely angular butt end (Z of the tongues (I. As mains for the confinement of the pairs of key blocks. those here shown consist in screws 7. one for each pair. each screw passing through one of the hey blocks.

and having its head in engagement therewith while its transversely extending shankhas a screw thread engagement with the opposite block. Thus. while the key blocks when in their places effectually prevent both circumferential or creeping movements of the rim on the telly and by their angular end formations engaging the shoulders 7 and the angular butt ends of the tongues or lugs (7. the retention of the screw blocks themselves is most reliably maintained by the headed screws or bolts.

Inasmuch as the rim after having for a long time remained onthe felly. may become rusted. stuck or otherwise set thereon, the

telly and rim have integral or permanently atlixed edgewise extending studs or dowel like members 9'. at adiacent relations as shown in 1 and 5"so that by the insertion of a rigid rod or small bar or any suitable available implement between suchstuds and a prying action thereby (of course when the key blocks shall have been moved), the starting movementcircumferentially of the rim relatively to the telly maybe,v conveniently and positively accomplished.

Changes of minor character and as to too form, number and arrangement of the parts and coacting features (it this device may he made withoutdeparting from my invention.

I claim The combination at a llXQtl rim having a series at recesses extending across the peripherv one end of each recess being tei'n'iecl (if two flatnvalle meeting: mitlu'a v m the etlges tutorm an obtuse angle, the ether end of each recess being composed of two WflllS converging from each Side QtlQ'Q t0 meet at the middle of the rim at an acute angle and form a pocket, a clemountahle rim fitting the periphery of the saitl fixed rim and pro vided with a series of quadrangular lugs corresponding in position te the said reeesses in the other rim, the time having two faces converging from the sine. edge of the rim to meet at the middle of the rim periphery and form an acute angle corresponding to the said acute angle of the pocket in the other rim, the other two faces of the lug 1,05e,me

meeting at the lllidtllQ (it the periphery m an nhtuse angle and ftttlllfl spaced from the saitl acute angled walls of the recesses of the other rim when the lugs are seated in the sairl pockets of the other rim member, antl a pair of key blocks in each of the said 't'ectwSt; cue on each sirle that have convergent: entls to engage the said ehtuee aneleit faces and "\YflllS of the lugs and recess 8 respectivel at their outer p0rtie1'is,anr l a scren hnlt passing through the key blocks to draw them together in each pair and force the lugfi into the imcltets to lock the rim members in engagement.

Signed by me at; Springfield. Mass., in presence t two suhscrihing witnesses.

ALBERT DEXIS.

Witnesses WM. S. Bnmiovvs, G. R. Dmsconn. 

